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Quits tens gaunt on OSCAR F. BURTON, 0F J ERSE-Y CITY, NEW- LettersPatent lVo. 61,99'l, dated February 12, 1867.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, OSCAR F. BURTON, of Jersey City, in the county atHudson, sndState of'P Iew Jersey, have invented a certain new and usefulimprovement on Ploughs or Cultivators, of which the following is a full,clear, and exact description.

My improvement has reference to constructing the mould board, shareforother usually metal portion of ploughs or cultivstors, which work in orare exposed to the soil, of a, peculiar composition of alloy that shallpossess the advantages of comparative freedom from rust, with a slipperynature or chardcter that will prevent or lessen the adhesion of soil tosuch parts, and that willadmit of being easily sndperfectly scoured;While some-materials possess one -or other of these advantages, they aredefective in other respects as substitutes for iron in the objectsmentioned: Thus steel rapidly oxidizes in, some soils, ond when rnsted,tskca a long time to scour clean, while other materials that are freefrom these objections have others, such asltoo great brittleness andliability to' ivurp in casting, which makes the renewal of th'e'psrts toell'ect a fit u metterof no littledifi- 'culty. To secure thedesideratum here specified is the object-of my invention, the nature ofvlhich consists in constructing the articles mentioned of an ulloy, -thecomposition of which is mainly; him, with considerably lesserproportions of tin and c'opper, 'to which may be added comparativelyvery small quantiticsof antimony and leud, or either. From experimentsmade, I find that mould-boards, shares,-o.nd other parts cutting orrubbing in oven the soil, ,of ploughs, cultivators, and such likemachines, are comparatively free from rust, easily scoured,

and have a soapy or slippery character, which lessens the tendency ofrsoil adhering to them, the advantages of allof which are well understoodby farmers agricultural implement builders, and others. I- also findthst such articles, constructed of an alloy as described, which readilyadmits of custingjn any desired form, cclnbi'ne'hoth tenucity andductility. Thus the copper, asone ingredient, husthe peculiarcharacteristic of tenacity; tin,,that of ductility; antimony, where.added, has a hard non-adhesivc'quolity; and lead, great ductility; whilethe zinc, which forms the basis of the alloy, is comparatively cheap. Inthe'productionof this alloy for the purposes named, the proportions (inor ubout) of the 'difl'erpnt metals which I have found from experimentsto answer best are, any fourteen (14) ports in weight of copper, thesome of tin, mld'seventy-seven (77) parts of zinc, -to whichrna-y beadded three (3) parts oi antimony and one (1) oi lead.

What I claim us new and useful, end desireto secure by Letters Patent,is--'- The manufacture of the mould-boards, shares, and other parts ofplonghs and cultivator-s working in and exposed to the soil, 'of analloy composed of copper, tin, and zinc, with or without sntimonyundlead, or either,

substantially as specified.

OSCAR F. BURTON.

Witnesses:

J. W. Cocnn's, G. W. Benn,

